Furnace water wall or baffle



Dec. l5, 1931. T. LADD FURNACE WATER WALL on BAFFLE Filed Aug. 17, 1928 2 Sheets-Sheet 1 Dec. 15, 1931. T. LADD FURNACE WATER WALL 0R BAFFLE 2 Sheets-Sheet 2 Filed Aug. 17, 1928 INVENTOR BY l M ORNEYS Patented Dec. 15, 1931 UNITED STATES PATENT OFFICE TALLMAN LADD, OF CORAOPOIIS, PENNSYLVANIA, ASSIGNOR TO INTERNATIONAL COM- BUSTION ENGINEERING QORPORATION, 0F NEW YORK, N. Y., A CORPORATION 0F DELAWARE FURNACE WATER WALL 0R BAFFLE Application 'led August 17, 1928. Serial No. 300,269.

This invention relates to furnace water walls or bailies and is particularly adapted for use in connection with walls or baifles which are composed of finned water tubes.

Among the more important objects of the invention are the provision of means in the nature of a channel-like member for joining or sealing adjacent tube fins in the wall and the provision of means for protecting the fin joining means from excessive heat.

How the foregoing together with such other objects and advantages as may appear hereinafter are obtained will be clear from a consideration of the following description taken with the accompanying drawings which illustrate the preferred embodiment`of the invention and in which f Figure 1 is a fragmentary side elevation .of a group of tubes with the device of the present invention applied thereto.

Figure 2 is a horizontal sectional view taken as indicated bythe line 2-2 of Figure 1.

Figure 3 is a verticalsectional view taken as indicated bythe line 3-3 of Figure 1.

Figure 4 shows a modification of the Inanner in which the device may be secured to the fins of the tubes, and

Figure 5 discloses a modified form of a detail of the invention.

Referring now particularly to Figures 1, 2 and 3 the water tubes are indicated by the reference letter 6 and the fins which extend longitudinally on adjacent sides of the tubes are indicated at 7, the same being spaced apart a vsmall distance.

In all ordinary construction it is practically impossible to arrange the tubes accurately and closely enough to make their fins abut and provide a substantially unbroken Wall;` hence small spaces always occur between the iins.

Between the tubes 6 and overlying adjacent pairs of fins 7 I have provided channellike members 8 positioned with their sides or legs 9 adjacent to the fins. These channel-like members 8 are secured and carried on the fins 7 by means of wedging mechanisms, each one of which includes an apertured lug 10 secured to a iin 7 i n some suitable manner as by welding andvextending outwardly therefrom thru a recess 11 formedl in a side of a member 8. Wedges 12 are inserted in the apertures in the lugs 10 and engage the channel-like members 8 to support and secure the same in position.

Between the channel-like members 8 and the fins 7 I interpose some suitableheat insulatingiand/ packing material 13 such, for

example, as asbestos.

It should benoted that thefuse of a mem-.

ber which is channel-like in form results in a construction which is not only very rigid and strong, but which is also advantageous as the legs 9 of the channels 8 cooperate with the ns 7 to form a pocket which is conveniently adapted to receive the insulating and sealing material 13.

When the device is used in connection with iinned tubes which compose or occupy the position of a baille, it is obvious that the sealing of the space or openin between the fins renders the baiHe Very e ective in diverting or directing gases thru the boiler.

When the device is used in conjunction with a iinned tube lined combustion chamber, the channel-like members 8 are, of course, positioned on the side of the fins 7 away from the combustion chamber and in this case the in-' sulating material 13 effectively protects the members 8 and their wedge supporting means from radiant heat. It might be noted thatl the device is particularly useful in connection with the walls of a furnace combustion chamber which is adapted to burn pulverized fuel admitted tangentially or in some other swirling or violently eddying manner. In such cases the fuel and ash particles swirl and move tially unbroken surface to the combustionl chamber so that such particles do not adhere to and build up on theedges of the fins.

In places where the tubes to which the device of this invention is to be applied, extend substantially horizontally the wedges 12 might have a tendency to work loose. In order to completely obviate this diiiculty the small ends of the Wedges may be bent to one side after they have been inserted through the apertures in the lugs 10. This is illus` trated in Figure 4. The Wedge illustrated in Figure 5 having a longitudinal slit at its narrow end forming the prongs 14 may also be used in places Where the tubes to which the device is applied extend substantially horizontally. The prongs 14 of this Wedge may be bent in opposite direction in order to eectively prevent the Wedges from loosening and Working out of the apertures in the lugs 10.

1. A Water Wall construction including a row of tubes, fins on adjacent sides of the tubes and channel-like members for joining adjacent fins, the legs of the said members being positionedadjacent to the fins, together with insulating material in said channel-like members.

2. A Water Wall construction includinga row of tubes, ins on adjacent sides of the tubes, channel-like members for joining adjacent ins, the legs of the said members being positioned adjacent to the fins and insulating material in the channel-like members, together With means for securing said members to the fins including apertured lugs secured to the' latter and extending therefrom through openingsin the members and Wedges coopering with the lugs and engaging the mem- 3. A water wall construction including a row 'of tubes, fins disposed on adjacent sides of the tubes and spaced apart and means for sealing the spaces including members extending along and secured to the fins and insulatjing material between the members and the In testimony whereof I have hereunto signed my name.

TALLMAN LADD. 

